Kotlin Developer
First seen by Alion on Oct 23, 2026.
Location: Fully remote you can be based anywhere in the world
Hours: Flexible aim for at least 2 hours of overlap with UK time (09:0017:00 GMT/BST)
Salary: $700$1100 USD/month
Contract: Full-time permanent
The location shown on this listing is where the client is based. This role is fully remote no relocation required. Candidates from anywhere are welcome to apply.
About the companyRemote World is partnering with a UK telehealth startup providing online mental health support a UK-based employer to hire for this role. Theyve matched over 30000 patients with therapists through their platform and theyre expanding their backend services to support group therapy and employer programmes.
The roleYoull build Spring Boot services in Kotlin that power the matching engine session scheduling and billing integrations. Working in a small backend team youll own features end to end write tests participate in code review and help the team keep latency low as the patient base grows.
What youll do- Build and maintain Kotlin Spring Boot services
- Design and implement new API endpoints for mobile and web clients
- Write unit and integration tests with Kotest or JUnit
- Optimise slow database queries and reduce API latency
- Participate in on-call rotation and service health reviews
- Hands-on Kotlin experience in a Spring Boot context
- Comfortable with SQL and JPA/Hibernate
- Understanding of REST API design and versioning
- You write tests and use code review productively
- Good async written communication
- Experience with event-driven systems (Kafka or RabbitMQ)
- Familiarity with healthcare data standards (HL7 FHIR)
- $700$1100 USD/month paid monthly
- Fully remote work from anywhere
- Flexible hours with some UK overlap
- $500/year learning budget
- Home office equipment stipend
Apply through Remote World send your CV and a short note on why youre a great fit. If you dont tick every box apply anyway. We hire for potential and attitude as much as experience.